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NetBSD/sys/arch/arm32/vidc/vidcaudio.c

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/* $NetBSD: vidcaudio.c,v 1.22 1998/01/18 03:48:38 mark Exp $ */
/*
* Copyright (c) 1995 Melvin Tang-Richardson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the RiscBSD team.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Yikes just had a look at this and realised that it does not conform
* to Kernel Normal Form at all. I have fixed the first few functions
* but there are a lot more still to do - mark
*/
/*
* audio driver for the RiscPC 16 bit sound
*
* Interfaces with the NetBSD generic audio driver to provide SUN
* /dev/audio (partial) compatibility.
*
*/
#include <sys/param.h> /* proc.h */
#include <sys/types.h> /* dunno */
#include <sys/conf.h> /* autoconfig functions */
#include <sys/device.h> /* device calls */
#include <sys/proc.h> /* device calls */
#include <sys/audioio.h>
#include <sys/errno.h>
#include <sys/systm.h>
#include <vm/vm.h>
#include <vm/vm_kern.h>
#include <dev/audio_if.h>
#include <machine/irqhandler.h>
#include <machine/vidc.h>
#include <machine/katelib.h>
#include <arm32/iomd/iomdreg.h>
#include <arm32/mainbus/mainbus.h>
#include <arm32/vidc/waveform.h>
#include "vidcaudio.h"
#undef DEBUG
struct audio_general {
vm_offset_t silence;
irqhandler_t ih;
void (*intr) ();
void *arg;
vm_offset_t next_cur;
vm_offset_t next_end;
void (*next_intr) ();
void *next_arg;
int buffer;
int in_progress;
int open;
} ag;
struct vidcaudio_softc {
struct device device;
int iobase;
int open;
};
int vidcaudio_probe __P((struct device *parent, struct cfdata *cf, void *aux));
void vidcaudio_attach __P((struct device *parent, struct device *self, void *aux));
int vidcaudio_open __P((void *addr, int flags));
void vidcaudio_close __P((void *addr));
int vidcaudio_intr __P((void *arg));
int vidcaudio_dma_program __P((vm_offset_t cur, vm_offset_t end, void (*intr)(), void *arg));
void vidcaudio_dummy_routine __P((void *arg));
int vidcaudio_stereo __P((int channel, int position));
int vidcaudio_rate __P((int rate));
void vidcaudio_shutdown __P((void));
static int sound_dma_intr;
struct cfattach vidcaudio_ca = {
sizeof(struct vidcaudio_softc), vidcaudio_probe, vidcaudio_attach
};
int vidcaudio_query_encoding __P((void *, struct audio_encoding *));
int vidcaudio_set_params __P((void *, int, int, struct audio_params *, struct audio_params *));
int vidcaudio_round_blocksize __P((void *, int));
int vidcaudio_start_output __P((void *, void *, int, void (*)(), void *));
int vidcaudio_start_input __P((void *, void *, int, void (*)(), void *));
int vidcaudio_halt_output __P((void *));
int vidcaudio_halt_input __P((void *));
int vidcaudio_speaker_ctl __P((void *, int));
int vidcaudio_getdev __P((void *, struct audio_device *));
int vidcaudio_set_port __P((void *, mixer_ctrl_t *));
int vidcaudio_get_port __P((void *, mixer_ctrl_t *));
int vidcaudio_query_devinfo __P((void *, mixer_devinfo_t *));
int vidcaudio_get_props __P((void *));
struct audio_device vidcaudio_device = {
"VidcAudio 8-bit",
"x",
"vidcaudio"
};
struct audio_hw_if vidcaudio_hw_if = {
vidcaudio_open,
vidcaudio_close,
0,
vidcaudio_query_encoding,
vidcaudio_set_params,
vidcaudio_round_blocksize,
0,
0,
0,
vidcaudio_start_output,
vidcaudio_start_input,
vidcaudio_halt_output,
vidcaudio_halt_input,
vidcaudio_speaker_ctl,
vidcaudio_getdev,
0,
vidcaudio_set_port,
vidcaudio_get_port,
vidcaudio_query_devinfo,
0,
0,
0,
0,
vidcaudio_get_props,
};
void
vidcaudio_beep_generate()
{
vidcaudio_dma_program ( ag.silence, ag.silence+sizeof(beep_waveform)-16,
vidcaudio_dummy_routine, NULL );
}
int
vidcaudio_probe(parent, cf, aux)
struct device *parent;
struct cfdata* cf;
void *aux;
{
int id;
id = IOMD_ID;
/* So far I only know about this IOMD */
switch (id) {
case RPC600_IOMD_ID:
return(1);
break;
case ARM7500_IOC_ID:
case ARM7500FE_IOC_ID:
#ifdef RC7500
return(0);
#else
return(1);
#endif
break;
default:
printf("vidcaudio: Unknown IOMD id=%04x", id);
break;
}
return (0);
}
void
vidcaudio_attach(parent, self, aux)
struct device *parent;
struct device *self;
void *aux;
{
struct mainbus_attach_args *mb = aux;
struct vidcaudio_softc *sc = (void *)self;
int id;
sc->iobase = mb->mb_iobase;
sc->open = 0;
ag.in_progress = 0;
ag.next_cur = 0;
ag.next_end = 0;
ag.next_intr = NULL;
ag.next_arg = NULL;
vidcaudio_rate(32); /* 24*1024*/
/* Program the silence buffer and reset the DMA channel */
ag.silence = kmem_alloc(kernel_map, NBPG);
if (ag.silence == NULL)
panic("vidcaudio: Cannot allocate memory\n");
bzero((char *)ag.silence, NBPG);
bcopy((char *)beep_waveform, (char *)ag.silence, sizeof(beep_waveform));
ag.buffer = 0;
/* Install the irq handler for the DMA interrupt */
ag.ih.ih_func = vidcaudio_intr;
ag.ih.ih_arg = NULL;
ag.ih.ih_level = IPL_NONE;
ag.ih.ih_name = "vidcaudio";
ag.intr = NULL;
/* ag.nextintr = NULL;*/
id = IOMD_ID;
switch (id) {
#ifndef CPU_ARM7500
case RPC600_IOMD_ID:
sound_dma_intr = IRQ_DMASCH0;
break;
#else
case ARM7500_IOC_ID:
case ARM7500FE_IOC_ID:
sound_dma_intr = IRQ_SDMA;
break;
#endif
}
disable_irq(sound_dma_intr);
if (irq_claim(sound_dma_intr, &(ag.ih)))
panic("vidcaudio: couldn't claim IRQ %d\n", sound_dma_intr);
disable_irq(sound_dma_intr);
printf("\n");
vidcaudio_dma_program(ag.silence, ag.silence+NBPG-16,
vidcaudio_dummy_routine, NULL);
audio_attach_mi(&vidcaudio_hw_if, 0, sc, &sc->device);
#ifdef DEBUG
printf(" UNDER DEVELOPMENT (nuts)\n");
#endif
}
int
vidcaudio_open(addr, flags)
void *addr;
int flags;
{
struct vidcaudio_softc *sc = addr;
#ifdef DEBUG
printf("DEBUG: vidcaudio_open called\n");
#endif
if (sc->open)
return EBUSY;
sc->open = 1;
ag.open = 1;
return 0;
}
void
vidcaudio_close(addr)
void *addr;
{
struct vidcaudio_softc *sc = addr;
vidcaudio_shutdown();
#ifdef DEBUG
printf("DEBUG: vidcaudio_close called\n");
#endif
sc->open = 0;
ag.open = 0;
}
/* ************************************************************************* *
| Interface to the generic audio driver |
* ************************************************************************* */
int vidcaudio_query_encoding ( void *addr, struct audio_encoding *fp )
{
switch ( fp->index )
{
case 0:
strcpy (fp->name, "vidc" );
fp->encoding = AUDIO_ENCODING_ULAW;
fp->precision = 8;
fp->flags = 0;
break;
default:
return (EINVAL);
}
return 0;
}
int
vidcaudio_set_params(addr, setmode, usemode, p, r)
void *addr;
int setmode, usemode;
struct audio_params *p, *r;
{
if (p->encoding != AUDIO_ENCODING_ULAW ||
p->channels != 8)
return EINVAL;
vidcaudio_rate(4 * p->sample_rate / (3 * 1024)); /* XXX probably wrong */
return 0;
}
int vidcaudio_round_blocksize ( void *addr, int blk )
{
if (blk > NBPG)
blk = NBPG;
return (blk);
}
#define ROUND(s) ( ((int)s) & (~(NBPG-1)) )
int vidcaudio_start_output ( void *addr, void *p, int cc,
void (*intr)(), void *arg )
{
/* I can only DMA inside 1 page */
#ifdef DEBUG
printf ( "vidcaudio_start_output (%d) %08x %08x\n", cc, intr, arg );
#endif
if ( ROUND(p) != ROUND(p+cc) )
{
/* If it's over a page I can fix it up by copying it into my buffer */
#ifdef DEBUG
printf ( "vidcaudio: DMA over page boundary requested. Fixing up\n" );
#endif
bcopy ( (char *)ag.silence, p, cc>NBPG ? NBPG : cc );
p=(void *)ag.silence;
/* I can't DMA any more than that, but it is possible to fix it up */
/* by handling multiple buffers and only interrupting the audio */
/* driver after sending out all the stuff it gave me. That it more */
/* than I can be bothered to do right now and it probablly wont */
/* happen so I'll just truncate the buffer and tell the user */
if ( cc>NBPG )
{
printf ( "vidcaudio: DMA buffer truncated. I could fix this up\n" );
cc=NBPG;
}
}
vidcaudio_dma_program ( (vm_offset_t)p, (vm_offset_t)(p+cc), intr, arg );
return 0;
}
int vidcaudio_start_input ( void *addr, void *p, int cc,
void (*intr)(), void *arg )
{
return EIO;
}
int vidcaudio_halt_output ( void *addr )
{
#ifdef DEBUG
printf ( "DEBUG: vidcaudio_halt_output\n" );
#endif
return EIO;
}
int vidcaudio_halt_input ( void *addr )
{
#ifdef DEBUG
printf ( "DEBUG: vidcaudio_halt_input\n" );
#endif
return EIO;
}
int vidcaudio_speaker_ctl ( void *addr, int newstate )
{
#ifdef DEBUG
printf ( "DEBUG: vidcaudio_speaker_ctl\n" );
#endif
return 0;
}
int vidcaudio_getdev ( void *addr, struct audio_device *retp )
{
*retp = vidcaudio_device;
return 0;
}
int vidcaudio_set_port ( void *addr, mixer_ctrl_t *cp )
{
return EINVAL;
}
int vidcaudio_get_port ( void *addr, mixer_ctrl_t *cp )
{
return EINVAL;
}
int vidcaudio_query_devinfo ( void *addr, mixer_devinfo_t *dip )
{
return ENXIO;
}
int vidcaudio_get_props ( void *addr )
{
return 0;
}
void vidcaudio_dummy_routine ( void *arg )
{
#ifdef DEBUG
printf ( "vidcaudio_dummy_routine\n" );
#endif
}
int vidcaudio_rate ( int rate )
{
WriteWord ( VIDC_BASE, VIDC_SFR | rate );
return 0;
}
int vidcaudio_stereo ( int channel, int position )
{
if ( channel<0 ) return EINVAL;
if ( channel>7 ) return EINVAL;
channel = channel<<24 | VIDC_SIR0;
WriteWord ( VIDC_BASE, channel|position );
return 0;
}
#define PHYS(x) (pmap_extract( kernel_pmap, ((x)&PG_FRAME) ))
/*
* Program the next buffer to be used
* This function must be re-entrant, maximum re-entrancy of 2
*/
#define FLAGS (0)
int vidcaudio_dma_program ( vm_offset_t cur, vm_offset_t end,
void (*intr)(), void *arg )
{
/* If there isn't a transfer in progress then start a new one */
if ( ag.in_progress==0 )
{
ag.buffer = 0;
IOMD_WRITE_WORD(IOMD_SD0CR, 0x90); /* Reset State Machine */
IOMD_WRITE_WORD(IOMD_SD0CR, 0x30); /* Reset State Machine */
IOMD_WRITE_WORD(IOMD_SD0CURB, PHYS(cur));
IOMD_WRITE_WORD(IOMD_SD0ENDB, PHYS(end-16)|FLAGS);
IOMD_WRITE_WORD(IOMD_SD0CURA, PHYS(cur));
IOMD_WRITE_WORD(IOMD_SD0ENDA, PHYS(end-16)|FLAGS);
ag.in_progress = 1;
ag.next_cur = ag.next_end = 0;
ag.next_intr = ag.next_arg = 0;
ag.intr = intr;
ag.arg = arg;
/* The driver 'clicks' between buffer swaps, leading me to think */
/* that the fifo is much small than on other sound cards. So */
/* so I'm going to have to do some tricks here */
(*ag.intr)(ag.arg); /* Schedule the next buffer */
ag.intr = vidcaudio_dummy_routine; /* Already done this */
ag.arg = NULL;
#ifdef PRINT
printf ( "vidcaudio: start output\n" );
#endif
#ifdef DEBUG
printf ( "SE" );
#endif
enable_irq(sound_dma_intr);
}
else
{
/* Otherwise schedule the next one */
if ( ag.next_cur!=0 )
{
/* If there's one scheduled then complain */
printf ( "vidcaudio: Buffer already Q'ed\n" );
return EIO;
}
else
{
/* We're OK to schedule it now */
ag.buffer = (++ag.buffer) & 1;
ag.next_cur = PHYS(cur);
ag.next_end = PHYS(end-16);
ag.next_intr = intr;
ag.next_arg = arg;
#ifdef DEBUG
printf ( "s" );
#endif
}
}
return 0;
}
void vidcaudio_shutdown ( void )
{
/* Shut down the channel */
ag.intr = NULL;
ag.in_progress = 0;
#ifdef PRINT
printf ( "vidcaudio: stop output\n" );
#endif
IOMD_WRITE_WORD(IOMD_SD0CURB, ag.silence);
IOMD_WRITE_WORD(IOMD_SD0ENDB, (ag.silence + NBPG - 16) | (1<<30));
disable_irq(sound_dma_intr);
}
int vidcaudio_intr ( void *arg )
{
int status = IOMD_READ_BYTE(IOMD_SD0ST);
void (*nintr)();
void *narg;
void (*xintr)();
void *xarg;
int xcur, xend;
IOMD_WRITE_WORD(IOMD_DMARQ, 0x10);
#ifdef PRINT
printf ( "I" );
#endif
if ( ag.open==0 )
{
vidcaudio_shutdown ();
return 0;
}
/* Have I got the generic audio device attached */
#ifdef DEBUG
printf ( "[B%01x]", status );
#endif
nintr=ag.intr;
narg=ag.arg;
ag.intr = NULL;
xintr=ag.next_intr;
xarg=ag.next_arg;
xcur=ag.next_cur;
xend=ag.next_end;
ag.next_cur = 0;
ag.intr = xintr;
ag.arg = xarg;
if ( nintr )
{
#ifdef DEBUG
printf ( "i" );
#endif
(*nintr)(narg);
}
if ( xcur==0 )
{
vidcaudio_shutdown ();
}
else
{
#define OVERRUN (0x04)
#define INTERRUPT (0x02)
#define BANK_A (0x00)
#define BANK_B (0x01)
switch ( status&0x7 )
{
case (INTERRUPT|BANK_A):
#ifdef PRINT
printf( "B" );
#endif
IOMD_WRITE_WORD(IOMD_SD0CURB, xcur);
IOMD_WRITE_WORD(IOMD_SD0ENDB, xend|FLAGS);
break;
case (INTERRUPT|BANK_B):
#ifdef PRINT
printf( "A" );
#endif
IOMD_WRITE_WORD(IOMD_SD0CURA, xcur);
IOMD_WRITE_WORD(IOMD_SD0ENDA, xend|FLAGS);
break;
case (OVERRUN|INTERRUPT|BANK_A):
#ifdef PRINT
printf( "A" );
#endif
IOMD_WRITE_WORD(IOMD_SD0CURA, xcur);
IOMD_WRITE_WORD(IOMD_SD0ENDA, xend|FLAGS);
break;
case (OVERRUN|INTERRUPT|BANK_B):
#ifdef PRINT
printf( "B" );
#endif
IOMD_WRITE_WORD(IOMD_SD0CURB, xcur);
IOMD_WRITE_WORD(IOMD_SD0ENDB, xend|FLAGS);
break;
}
/*
ag.next_cur = 0;
ag.intr = xintr;
ag.arg = xarg;
*/
}
#ifdef PRINT
printf ( "i" );
#endif
if ( ag.next_cur==0 )
{
(*ag.intr)(ag.arg); /* Schedule the next buffer */
ag.intr = vidcaudio_dummy_routine; /* Already done this */
ag.arg = NULL;
}
return(0); /* Pass interrupt on down the chain */
}
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